Updated Common Overrides (markdown)

Common-Overrides.md

@@ -19,6 +19,50 @@ To enable certain functions, `copy+paste` the appropriate prefs to the `MY OVERR
 
 ***
 
+### Color Theme
+
+The Firefox window and toolbar match your OS light or dark [color theme](https://support.mozilla.org/en-US/kb/use-themes-change-look-of-firefox#w_managing-themes) by default. Betterfox ensures sub-pages and website themes also match your system theme.
+
+You can override this and force Firefox's settings pages and websites to always use a light or dark appearance.
+
+* `☰` *→ Settings → General → Language and Appearance → Website appearance*
+
+```javascript
+// PREF: preferred color scheme for websites and sub-pages
+// Dark (0), Light (1), System (2), Browser (3)
+user_pref("layout.css.prefers-color-scheme.content-override", 0); 
+```
+
+***
+
+### Downloads
+
+Betterfox's default download settings prioritize security. However, some users prefer to customize these prefs.
+
+#### Ask where to download
+
+* `☰` *→ Settings → General → Files and Applications → Downloads → Always ask you where to save files*
+
+```javascript
+// PREF: always ask where to download
+// true = Direct download
+// false = The user is asked what to do
+user_pref("browser.download.useDownloadDir", true);
+```
+
+#### New file types
+
+* `☰` *→ Settings → General → Files and Applications → Applications → What should Firefox do with other files?*
+
+```javascript
+// PREF: always ask how to handle new mimetypes
+// false = Save files
+// true = Ask whether to open or save files
+user_pref("browser.download.always_ask_before_handling_new_types", false);
+```
+
+***
+
 ### Password, credit card, and address management
 The built-in password manager is disabled for security.